Why does men like Breast so much?

No wonder Breast Implants are such a great hit now a days because Men like big boobies. just imagine if the chest can actually lactate milk even though the woman hasn't been given birth yet. do you like that kind of girl who you breast feed to and get's milk from them.
I have heard from office mates who have DD's and C's that they sometimes seduced their co-workers to get their work done. I am not sure if they actually went off the wall besides seducing those guys.
IS there any possible explanation why men like breast so much.when i think they have their own, specially when they're fat
Women can answer too.

I have asked that same question a million of times to my boyfriend, but until now, he cannot fully explain, why men really go gaga for boobies.. I mean, it's nothing but fat and it produces milk! what the hell is so sexy about that?! lol. Well, there are really just things that we cannot explain.. and one of these is the million dollar question.. why do men love boobs?!

I think it's human nature that's why. To be perfectly honest I really don't like big(extremes)boobies because they don't even look sexy if it's not in proportion with their bodies.
Maybe it has something to do with the saying "the bigger the better" :)